Peter Kröner
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sirpepe.bsky.social
Peter Kröner
@sirpepe.bsky.social
130 followers 110 following 720 posts
Shitposting about vanilla #webdev. Also there's cat pictures and bursts of travel. Reading web technology specs and doing training/consulting on said web technologies.

Also at @[email protected]
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sirpepe.bsky.social
"There is no syntactic means to create instances of GeneratorFunction subclasses" says the ECMAScript specification. Well, if you just call your new constructor it works fine ¯\_(ツ)_/¯

#javascript #webdev
class GenFnSubclass extends (function*(){}).constructor {} const instance = new GenFnSubclass("yield 23"); instance instanceof GenFnSubclass returns true
November 11, 2025 at 3:25 PM
sirpepe.bsky.social
Sure, let's start the new talk with this slide.
function whatever(a, b) {} whatever[0] = 23; whatever[1] = 42; Object.setPrototypeOf(whatever, Array.prototype); whatever.forEach((value) => { console.log(value); });
November 11, 2025 at 1:38 PM
sirpepe.bsky.social
Code.Movie 0.0.37 now supports static syntax highlighting to supplement the existing animation features. Some CSS improvements are also along for the ride.

📝 Post: code.movie/blog/static-...

📦 Package: www.npmjs.com/package/@cod...
import { highlightHTML } from "@codemovie/code-movie"; import { json } from "@codemovie/code-movie/language/json"; document.body.innerHTML += highlightHTML({ code: "[23, 42]" }, { language: json(), tabSize: 2, // other options are the same as for animateHTML() });
November 11, 2025 at 9:32 AM
sirpepe.bsky.social
Now excuse me while I get my calories back
Cranberry cake 😍
November 9, 2025 at 4:10 PM
sirpepe.bsky.social
Failed to photograph an adorable kingfisher on the #kiel canal today. Here's some boats and scenery instead.
Flat calm at the Kiel canal Eiderkanalschleuse More flat calm with a red cargo ship in the hazy distance Green cargo ship on the canal, with another ship following right behind
November 9, 2025 at 4:10 PM
sirpepe.bsky.social
Drei Workshops, dreimal 5 von 5 Punkten von allen Kategorien 💪
November 6, 2025 at 11:02 AM
sirpepe.bsky.social
Ready for some #CSS gore? Turns out keyframe names can be strings, which means...

#webdev
November 6, 2025 at 9:52 AM
sirpepe.bsky.social
#Fullstack #TypeScript developers vs. #vanilla #webdev ¯\_(ツ)_/¯
Left panel: multiple US marines strain to lift a log over their heads Right panel: Babushka carrying a giant log like it's nothing
November 5, 2025 at 2:28 PM
sirpepe.bsky.social
Math.sumPrecise() is neat #javascript #webdev
November 5, 2025 at 1:15 PM
sirpepe.bsky.social
Code.Movie 0.0.36: Customizable #javascript globals and many minor improvements!

📜 Blog post: code.movie/blog/customi...

📦 NPM package: www.npmjs.com/package/@cod...
November 4, 2025 at 3:44 PM
sirpepe.bsky.social
Too hungover for web development === the proper headspace for overengineering onion soup.
A pot of onion soup with parsley on top
November 3, 2025 at 5:28 PM
sirpepe.bsky.social
Missed posting the picture summing up my widely, enthusiastically celebrated return home last evening 🤪
Three cats loafing on a grey sofa, looking entirely unimpressed
October 30, 2025 at 7:53 AM
sirpepe.bsky.social
Kiel central station
October 29, 2025 at 4:48 PM
sirpepe.bsky.social
Hamburg! My train is on time, but the replacement for the replacement for my original connection is not. Time to pivot to the marginally slower regional service that SHOULD not yet be overrun by commuters.
Red electric locomotive, looking just as old and dirty as the rest of Hamburg central station Display showing the upcoming departure of RE70 to Kiel. Photographed through a somewhat dirty train window.
October 29, 2025 at 3:04 PM
sirpepe.bsky.social
Some months I get significantly more useful work done here than in my actual office.
October 29, 2025 at 11:39 AM
sirpepe.bsky.social
Alright, back to Kiel. I'm way too early - thanks DST!
S-Bahn EMU arriving at an underground station
October 29, 2025 at 8:24 AM
sirpepe.bsky.social
... and a final live coding extravaganza for good measure!
October 28, 2025 at 4:05 PM
sirpepe.bsky.social
And now something completely different:
October 28, 2025 at 2:27 PM
sirpepe.bsky.social
Today, as part of the IJS Fullstack Day I get to rant about web workers and stuff!
October 27, 2025 at 10:36 AM
sirpepe.bsky.social
Good morning and as always: dress for the conference you want!
Me in a T-shirt printed with "you wouldn't steal the sum total of human knowledge and experience for unse in your proprietary AI chatbot"
October 27, 2025 at 6:54 AM
sirpepe.bsky.social
Munich! With minimal delay! Now let's see if I remember where I'm supposed to be going ...
Several trains at Munich central station
October 26, 2025 at 4:19 PM
sirpepe.bsky.social
Final pre-flight checks for my upcoming talks are done. Bring it on 💪
October 26, 2025 at 2:18 PM
sirpepe.bsky.social
ICE 2 trains rule. So. Much. Space! The only thing missing is cupholders. Anyway, onwards to Munich!
ICE 2 interior
October 26, 2025 at 11:47 AM
sirpepe.bsky.social
This guy looks like he too would appreciate a snack.
ICE 2 unit ready to couple with another train
October 26, 2025 at 11:44 AM
sirpepe.bsky.social
Oh right, I did this for the sake of lunch! This snack is a solid 7/10, zero complaints.
Falafel... and also every other non-meat product that the Dönerbude has in store
October 26, 2025 at 11:08 AM